"The orgasm is the part of the sexual experience that happens between two and seven seconds before ejaculation. It combines an increase in full-body sensitivity, quickening of breath, and a flood of sensations through the scrotum and penis," Cadell says. "Ejaculation is the final step of stimulation and involves the release of semen, as well as the neurotransmitters that will send the body into 'rest and recovery mode,' or the refractory period."

And, as you know, once you hit that refractory period, you're down and out…at least for a little while. That's why becoming multi-orgasmic means more pleasure for the both of you: You can go longer. And when you let yourself hit your final peak, it's stronger than ever.

While it's not certain exactly how many Os a guy can have before he pops, Cadell says that during their studies, Masters and Johnson (what Showtime's Masters of Sex is based on) found one man who could achieve three orgasms in just 10 minutes. Talk about intense.

Want to up your O factor? As you feel yourself approaching "the point of no return," clench your PC muscles, the same muscles used to stop the flow of urine. If you time it right (it's all trial and error), you should be able to stop yourself from ejaculating but still experience an orgasm in all its glory.